.1. Community sources include commercial buildings, hospitals, hotels and houses. The school Office. Waste water from places such as pollutants, organic waste and food scraps, which is a substance used detergent campsites.
2. industrial sources such as fish sauce, the sugar factory. Canned food factory Paper mills Paint manufacturing plant, factory, industry, mining and tanning, these sources of emissions of organic waste into the water, causing polluted water sources, it also may release toxic metals and compounds such as toxic lead, mercury, cadmium, arsenic and cyanide water down.
3. farmers use fertilizer and agricultural sources due to pesticides and pest eradication more drugs as a priority. Fertilizer, pesticides and pest eradication of drugs, including animal manure will flow into water sources, substances, such accumulation occurred in more water sources.
4. wastewater from sewage waste disposal of this type occurred leading to a pile of discarded waste incorrectly method.